Prepare texts for offers creation form

[agpul]

Add changes in below section according to comments below:

• come up with a header name instead of "basic information"
• description for step 2 - access type

[eldenkat]

[eldenkat]

Access type:
Open Access: resources are immediately available with user authentication required.
Fully Open Access: provides unrestricted access instantly, with no authentication needed.
Order Required: access is granted following a request submission.
Other: additional access types may be specified to suit particular needs.